With the ethernet cable plugged in your PC directly, you can access interent, right? What's the IP address obtained? If it is public one, W8961ND cannot be used. If it is privite, you may use it as...

The hardware version for your TD-W8961ND is V1? No way to add more if it just supports 8.

Describe your connection issue in details. The operating system is Win7? Try chipmaker's driver and download the Atheros AR9380 one. https://www.atheros.cz/atheros-wireless-drivers.html

I don't know why they add UN there because UN stands for universal from my understanding. In this case, global users should be able to upgrade it, which is the same with the one without UN, right?

Offer, go to Wireles---Wirless Settings page, you can seen AP settings, right? Is the Local SSID the one your detected? If so, to secure it, you can go to wireless security. If you want to hide it,...

Are you trying to use it as a wireless router? http://www.tp-link.com/en/article/?faqid=616 If the domain won't work, try http://192.168.0.254.